the point is you shouldnt have to fix persay the problem. with 5" SAS you shouldnt have this issue. there is a stupid reason you are having this problem
A---too long shackle
B---wrong springs
C---incorrect position (front hanger or frame tubes)
D---incorrect installition (spring in backwards they should be marked front or rear)
i would lean towards the too long shackle first try putting a factory one on and the take a measurement.
CALL ALLPRO they should help if you bought it from them!!!!